AMD PowerTune

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AMD PowerTune
AMD PowerTune Technology logo 2014.svg
Design firm Advanced Micro Devices
Introduced December 2011
Type Dynamic frequency scaling

AMD PowerTune is a trademark for a series of dynamic frequency scaling technologies built into some AMD GPUs and APUs that allow the clock speed of the processor to be dynamically changed (to different P-states) by software. This allows the processor to meet the instantaneous performance needs of the operation being performed, while minimizing power draw, heat generation and noise. AMD PowerTune aims to solve thermal design power and performance constraints.[1]

Besides the reduced energy consumption, AMD PowerTune helps to lower the noise levels created by the cooling in desktop computers, and extends battery life in mobile devices. AMD PowerTune is the successor to AMD PowerPlay.[2]

Support for "PowerPlay" was added to the Linux kernel driver "amdgpu" on November, 11 2015.[3]

As a lecture from CCC in 2014 nicely shows, AMD's x86-64 SMU firmware is executed on some LatticeMico32 and PowerTune was modeled using Matlab.[4] This is similar to Nvidia's PDAEMON, the RTOS responsible for power on their GPUs.[5]

Overview

Architecture of the PowerTune version, that was introduced with GCN1.1-chips, such as the Bonaire

AMD PowerTune was introduced in the TeraScale 3 (VLIW4) with Radeon HD 6900 in Dec 15, 2010 and has been available in different development stages on Radeon- and AMD FirePro-branded products ever since.

Over the years, reviews which document the development of AMD PowerTune have been published by AnandTech.[6][7][8][9]

An additional technology named AMD ZeroCore Power has been available since the Radeon HD 7000 Series, implementing the Graphics Core Next microarchitecture.

The pointlessness of a fixed clock frequency was accredited in January 2014 by SemiAccurate.[10]

Operating system support

Support for PowerTune is contained in the Linux kernel device driver amdgpu.

AMD Catalyst is available for Microsoft Windows and Linux and supports AMD PowerTune since version.[which?]

The free and open-source "Radeon" graphics device driver has some support for AMD PowerTune, see "Enduro".[11]

Feature overview for AMD APUs

Features of AMD Accelerated Processing Units
Brand Llano Trinity Richland Kaveri Carrizo Bristol Ridge Raven Ridge    Desna,
Ontario,
Zacate		 Kabini,
Temash		 Beema,
Mullins		 Carrizo-L
Platform Desktop, Mobile Desktop, Mobile Mobile, Desktop Desktop, Mobile Ultra-mobile
Released Aug 2011 Oct 2012 Jun 2013 Jan 2014 Jun 2015 Jun 2016 Mar 2017 Jan 2011 May 2013 Q2 2014 May 2015
Fab. (nm) GlobalFoundries 32 SOI 28 14 TSMC 40 28
Die size (mm2) 228 246 245 244.62 TBA TBA 75 (+ 28 FCH) ~107 TBA
Socket FM1, FS1 FM2, FS1+, FP2 FM2+, FP3 FP4, FM2+ AM4, FP4 AM4 FT1 AM1, FT3 FT3b FP4
CPU architecture AMD 10h Piledriver Steamroller Excavator Zen Bobcat Jaguar Puma Puma+[12]
Memory support DDR3-1866
DDR3-1600
DDR3-1333		 DDR3-2133
DDR3-1866
DDR3-1600
DDR3-1333		 DDR4-2400
DDR4-2133
DDR4-1866
DDR4-1600		 DDR3L-1333
DDR3L-1066		 DDR3L-1866
DDR3L-1600
DDR3L-1333
DDR3L-1066		 DDR3L-1866
DDR3L-1600
DDR3L-1333
3D engine[lower-alpha 1] TeraScale 2
(VLIW5)		 TeraScale 3
(VLIW4)		 GCN 1.1
(Mantle, HSA)		 GCN 1.2
(Mantle, HSA)		 GCN 1.3
(Mantle, HSA)		 TeraScale 2
(VLIW5)		 GCN 1.1
Up to 400:20:8 Up to 384:24:6 Up to 512:32:8 Up to 768:48:12 80:8:4 128:8:4
IOMMUv1 IOMMUv2 IOMMUv1[13] TBA
Unified Video Decoder UVD 3 UVD 4.2 UVD 6 TBA UVD 3 UVD 4 UVD 4.2 UVD 6
Video Coding Engine N/A VCE 1.0 VCE 2.0 VCE 3.1 TBA N/A VCE 2.0 VCE 3.1
GPU power saving PowerPlay PowerTune N/A Enduro
Max. displays[lower-alpha 2] 2–3 2–4 2–4 3 4 TBA 2 TBA
TrueAudio N/A ✔[15] N/A[13]
FreeSync N/A ✔ N/A
/drm/radeon[16][17][11] ✔ N/A ✔
/drm/amd/amdgpu[18] N/A Experimental ✔ N/A Experimental

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Feature overview for AMD graphics cards

Features of AMD Radeon GPUs
R100 R200 R300 R400 R500 R600 RV670 R700 Evergreen Northern Islands Southern Islands Sea Islands
 Volcanic Islands Arctic
Islands/Polaris
Released Apr 2000 Aug 2001 Oct 2002 May 2004 Oct 2005 May 2006 Nov 2007 Jun 2008 Sep 2009 Oct 2010 Jan 2012 Sep 2013 Jun 2015 2016-Q2/Q3
Instruction set not publicly known TeraScale instruction set GCN instruction set
Microarchitecture TeraScale 1 (VLIW5) TeraScale 2 (VLIW5) TeraScale 3 (VLIW4) GCN 1.0 GCN 1.1 GCN 1.2 Polaris
Microarchitecture type Fixed pipeline Unified shader model
Direct3D 7.0 8.1 9.0 9.0b 9.0c 10.0 10.1 11.0 12.0 12.1
Shader Model 1.1 1.4 2.0+ 2.b 3.0 4.0 4.1 5.0
OpenGL 1.3 2.0 3.3 4.4 4.5
Vulkan N/A 1.0
OpenCL N/A 1.1 1.2 2.0
Power saving  ? PowerPlay PowerTune PowerTune & ZeroCore Power TBA
Unified Video Decoder N/A Avivo/UVD UVD+ UVD 2 UVD 2.2 UVD 3 UVD 4 UVD 4.2 UVD 5.0 or 6.0 TBA
Video Coding Engine N/A VCE 1.0 VCE 2.0 VCE 3.0 TBA
TrueAudio N/A ✔ TBA
FreeSync N/A ✔ TBA
Max. displays1 1–2 2 2–6 TBA
Max. resolution  ? 2–6x 2560×1600 2–6x 4096×2160 @ 60 Hz TBA
/drm/radeon ✔ N/A
/drm/amd/amdgpu N/A WIP[19] experimental ✔ TBA
  • 1 More displays may be supported with native DisplayPort connections, or splitting the maximum resolution between multiple monitors with active converters.


See also

References

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External links

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